American Society of Civil Engineers: Wastewater Treatment Plant Design, Engineering Practice Manuals and Reports - No. 36, N.York American Water Works Association: Water Quality Treatment arxl, McGraw-Hill, N.York, 1971.
NEUTR/'
NEUTi
GRUNDFOS
Teebm cal Data
Standard versions are equipped with a Bp seal between the lower ball bearing and the stator housing.
Tecdinic^al Data
Teclmical Data
ΤΟΞΩΤΗ ΑΥΤΟΚΑΘΑΡΙΖΟΜΕΝΗ ΕΣΧΑΡΑ ROTATING SELF - CLEANING SCREEN
Κτένι - Comb
As soon as the cleaning comb reaches the higher pxjlnf of the sieve, the solids are automatically thrown into the collection container, which is made of konata or steel. The disposal of solid waste can be done with a special basket or conveyor belt or other methods. The transmitter in the sensor is electrically excited and detects the ultrasonic pulse in the router or product surface, which partially reflects the pulse.
The time between transmission and reception of the pulse (the sonic travel time) is directly proportional to the distance between the sensor and the surface of the oroduct. Maximum measuring range The correct sensor for your particular application depends on the process and ambient conditions When choosing the sensor, you must take into account that the maximum measuring range of the individual sensor is determined by the attenuation of the ultrasonic pulse by the air as well as by the reflective properties of the product surface Both the level of background noise (e.g. when filling) and the mounting point can also affect the measurement. Check that the maamunri level height does not come with the blocking distance of the sensor (see page 9. -Technical data-).
If possible, the surface of the sensor should lie parallel to the surface of the product. The PE coating on the diaphragm of the FDU 84 and FOU 85 is an integral part of the measuring system and must not be damaged during installation. The connection cable for the FDU sensor is not designed as a support cable. Do not hang up the sensor in t.
For dust explosion areas The connection cable of the FDU must be laid in conduits. Local regulations for explosive atmospheres caused by dust must be observed. The inner surface of the tube should be as smooth as the edges are open, the temperature is equal to the temperature of the vessel. The sensor must always be mounted perpendicular to the surface of the vessel. the water and above the center of the gutter.
Connection terminals for 8ne iBTil heating are supplied together with the sensor. They should be marked in the conrtectioo area of the transmitter.
Ultrasonic Measurement
The two-channel version is for differential measurement or for monitoring two measuring points. The certified sensor ensures that the measuring system can be used in explosively hazardous areas. Prosonic FMU 860 transmitters and applications: For continuous arxJ voluntary measurement of liquids and solids in arxi silo tanks Prosonic FMU 861. Prosonic FMU 860 Water level measurement, e.g. to control the inflow and outflow of water or to control the pump in up to 5 steps Also.
Prosonic FMU 861 Flow rate measurement in gutter or overflow to determine vraier level with millimeter accuracy. The linearization curves for all common standard gutters and weirs are preset and can be called up as needed. Jie version with IP 6 6 housing, the amount flowing through is summed and displayed by the lotaliser. Also.. separate display of flood water on external counters .. sample control using a quantity or time function.
Prosonic FMU 862 Dual channel unit is used for differential level measurement, e.g. to control the screen cleaning process as a clogging function. Also: .. backwater alarm Backwater in dams detected, signaled and flow avk.' ^e' tta .. contact lava) measurameni without maintenance even in bad conditions. Protonic FMU 862 The tvKO-channel version is particularly cost-effective when the five-relay version is used to control two * measuring points, for example the largest and smallest switching pom·. Double overcharge protection. All Prosonic transmitters have an additional connection for external border detection. Even when the level moves within the blocking distance of the sensor.
Principle of operation The ultrasonic pulse emitted by the sensor is reflected back from the surface of the material or liquid and is received by the same sensor as an echo signal. The height of the product or the water level is then calculated from the duration of the ultrasonic signal (determining the echo level). The input dialog is based on the standard Endress+Hauser operation matrix, in which each input field is quickly and easily selected with the -V - (vertical) and -H - (horizontal) keys. The Prosonic transmitter is based on state-of-the-art evaluation methods, including soft logic elements for intelligent echo analysis.
Even with nearly unfavorable mounting points, the advantages of continuous non-contact ultrasonic measurement can be used by activating a special fixed target suppression -cd e or filtering factor.
SoHIcivofl I Punp Level Vokxnc
Signal overffca: '_ncerftow. commur.ic a ors) - LEDs: or even^· LED for each relay . to indicate the Eui or switching status of the relay, a Sghsd LED indicates. It works completely submerged, either resting on the bottom of the pool or tank to be aerated, or hanging on a float. The air and water are thoroughly mixed by the impeller and the mixture is discharged into the diffuser channels of the stator.
Due to the rotation of the impeller and stator, the gas is separated into very small bubbles. The large interphase for gas transfer thus created and the high turbulence of the gas-liquid jets leaving the stator allow high oxygen transfer rates and good oxygen utilization. This allows direct and homogeneous aeration of basins with a diameter of up to 6 meters depending on the type of unit (shown as «A in figure 1 and dimensioned in table I.
In municipal wastewater treatment, the diameter of the basin can be much larger because a large area develops around o A, which is aerated by the air lift of the rising air bubbles (0 B in the figure and Table I. In all cases, the aerator ensures close mixing of the contents of the basin and prevents settling of solids on the lake site due to high liquid velocities in the pool (up to 10 m/s in the directly aerated area and at least 0 .2 m/s).To get the most out of the performance characteristics of the submersible aerator, it is better to use a deeper pool with smaller cross-section than other designs, if there is a choice.
In very large basins and at very low BO D loads, the aerators can be mounted on mobile or swing bridges. Aerators mounted on fast rotating or moving bridges offer the advantage that the rising ir bubbles are retained in the water for a longer time and thus increase the ] oxygen transfer rate. In lagoons, lakes or rivers, ihc submersible aerators can be installed floating, either firmly anchored swinging back and forth by: ropes or self-propelled by taut cables.
The submersible aerators will be operated with compressed air if high oxygen transfer efficiency values are more important than a light ir".
Sensor for dissolved oxygen COS 3/COS 3 S
4 Endress+Hauser m i
2 ready-made exchangeable
Free prograrruning o( key parameleis on commisskxting allows the mstrumenl lo be optimally configured to suit the pro. Communication takes place via a weather-prol, iron-mounted keyboard There is no need to open the housing, so that the instrument can be mounted at the measuring point.
Electrodes for pH/Redox measurement o rb ir .iir (JUS 11/12/13
Mypex Instrument^nt. with options for ether one electrooe input or two electrode inputs for e'ecirode sei*-monitoring. State-of-the-art microprocessor based 5 cable currents at the end of the transmitter with calibration. operator instructions anc. MKN 2-wire supply unit ^ Mypex units are supplied through an integrated power supply unit in the rfcect mams connection or for 2 ^ connections using a separate pw^r MKN supply unit.
In the latter case, the MKN si4»)*y module supplies both the Mypex u«t with energy and the ssjn transmission from the Mypex via 2 lines. 20 mA measuring signals* galvanically isolated, i.e. also suitable for transmission to measuring signals that are not internally safe. The r«e-free signal transmission of the Mypex · is based on frequency modulation. Alarm decoder MKD The alarm decoder MKD decades the SIX possible alarm and alarm signals of the output signal of the Mypex umt. These messages can be sent* <3 three switch contacts on the MKD. The following measurements are monitored alongside two easily selectable imitations.
The alarm center is equipped with a modified C/4 20 mA cur'ers output for the ί.ι'.β'βΟ mess.ring signal. SeU beautiful ring Mypex unite improves measurement accuracy and retob*ty Two independent, symmetrical inputs with high itipedance enable highly accurate two-electrode systems. The two electrodes are continuously compared with each other. An alarm is issued when the preselected value β is exceeded for more than a predefined period. -monitoring of pH or redox measurement setups can be implemented using the Mypex umt in ΟΟΠΜ Τ'Ο'β Sensopac electrode system Natural (standard etecnode systems can be connected 1 0 tie Mypex [also. Calibration at the touch of a button button The Mypex unit offers you alternatives to caBxation. Zero and slope of the egg echo systems can be automatically calibrated by monitoring xnmersion in buffer Kjiuoons by pressing a key.
The lower bearing consists of a double row angular contact ball bearing, while the upper one is a single row ball bearing. The build-up of pressure in the cylinder housing is reduced with the help of an integrated air inlet. The pump is available with leak sensors to detect the presence of water in the oil and/or stater housing. Special implementations.
F water-repellent material The bags are mounted on a special stainless steel frame, designed for even distribution of the sludge. The system is electronically controlled from a programmable control panel, guaranteeing correct process flow. Dewater and dry. Changing the operating hours, dry matter content ol 15 -30% feasible, depending on the nature of the sludge. The volume of dewatered sludge produced depends on the sotide content of the raw and dewatered sludge.
